This notice is all over Yellowstone. It is a shame that people need to be warned about this, but since humans cannot control themselves, pools, springs and geysers have been damaged by garbage. I love Yellowstone and all of the state and national parks that I have visited. I have respect for nature, not necessarily a tree hugger, but I respect it. I love that my boys were always looking to protect the park and would report to the rangers any problems they would see and pick up trash to throw away. RESPECT.